tree b715ec68a741d6c8ad0c5f5982003930b78667da
parent afec3ceac169280d39df39bd2d92d6eafd09172e
author Stephen Li <stephenli@google.com> 1486690589 -0800
committer Stephen Li <stephenli@google.com> 1487102972 -0800

Deal with NPE if no pattern is specified

Change-Id: I7974a4679afaf9371549923e7da2f2ae83353ae3